About CalcSolver

Last updated September 29, 2026

CalcSolver is a set of free finance calculators built for Indian numbers — EMI, GST, income tax and SIP among them — plus a full scientific calculator, for anyone who needs a quick, correct answer. Everything runs in your browser: there is no account, no download and no upload of your numbers.

You may see it typed in different ways: CalcSolver or Calc Solver. They both mean this site. It is an independent project and is not affiliated with other websites that use similar names.

What we offer

• India finance calculators for EMI, GST, income tax (new vs old regime), SIP and HRA exemption, each using current Indian rules and rupee formatting.
• A scientific calculator with trigonometry, logarithms, roots, powers, factorials, memory, history and a Code Mode for typing expressions like sin(30)+2^3.
• Worked explanations beside each tool, so you can see the formula and the steps and not only the final number.

How we keep results accurate

The calculator uses its own expression parser (it never runs arbitrary code), and every tool's formulas are documented on its page. We test the calculation engine with automated tests and re-check tools against hand-worked examples. Read our editorial policy to see how we handle corrections.

Who runs the site

CalcSolver is operated by Hindustan Prime, a partnership firm registered in India (Village Mawaiya, Chakiya, Chandauli, Uttar Pradesh — 232102). Reach us any time on the contact page.

How the site is funded

CalcSolver is free to use and supported by advertising. Ads are labelled and kept separate from tools and explanations, and they never change a result.

What we are not

We are not a tax preparer, lender, financial adviser or teacher of record. Financial tools give estimates for planning only. See the disclaimer.